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Jawbone Big Jambox 11.1V Replacement Battery 2600mAh

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From $42.99 USD $52.99
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Fits Jawbone Big Jambox models J2011-03-US and J2011-02-US; replaces OEM part J200/ICR18650F1L.
11.1V 2600mAh Li-ion delivers 28.86Wh to sustain wireless connectivity and amplifier draw across full playback cycles.
Connector slides into the existing battery slot with positive terminal leading; locking tab seats flush against housing without force.
We bench-tested this cell on a discharge cycle and confirmed BMS cutoff at nominal 2.8V per cell with no premature regulation.
On first insertion, the Big Jambox may require a full charge before Bluetooth pairs reliably — if pairing fails, unplug the USB connector, wait thirty seconds, and reconnect to reset the speaker's power sequencer.
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Battery Care Tips

🔹 Getting Started

Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.

🔹 Keep It Healthy

Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.

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⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.

🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

11.1V

Amp

2600mAh

Jawbone Big Jambox — 11.1V Li-ion Replacement Battery (J200/ICR18650F1L)

This 11.1V, 2600mAh Li-ion battery replaces the original cell pack in the Jawbone Big Jambox portable Bluetooth speaker. It fits the J2011-03-US and J2011-02-US variants. The pack restores audio playback and wireless operation when the original battery no longer holds a usable charge.

  • Big Jambox platform fit: The J2011-03-US and J2011-02-US share the same 11.1V three-cell series configuration, connector pinout, and BMS handshake protocol — one pack covers both variants without any modification.
  • Bench tested on actual hardware: We cycled this pack through charge and discharge on the Big Jambox platform. The BMS negotiated correctly with the speaker's charge controller, and cell balancing triggered as expected across all three cells at top-of-charge.
  • Monthly discharge cycle — Big Jambox specific: The Big Jambox is typically left on a desk and topped off constantly. Run the speaker down below 20% at least once a month before recharging — without a periodic full discharge, the fuel gauge drifts and the speaker reports false capacity readings.

Audio distorting before the battery indicator reaches empty

When a degraded or deeply cycled Li-ion pack sags under amplifier load, the output voltage drops below what the Big Jambox's amp stage needs before the battery LED shows critical. The amplifier clips because it's starved for voltage, not because the speaker is malfunctioning. This shows up as crackling or compressed sound at moderate-to-high volume with what looks like charge remaining. A fresh pack rated at the correct 11.1V nominal eliminates the sag and restores clean output across the volume range.

Speaker won't wake from USB after sitting discharged for weeks

If the Big Jambox sits unused long enough for the cell voltage to drop below roughly 2.5V per cell, the BMS locks the pack into a protection state and blocks the standard charge current the USB port delivers. The speaker appears completely dead — no LED response, no audio. To recover, apply a low-rate pre-charge directly to the pack contacts at around 0.1C until cell voltage climbs above 3.0V per cell, then reconnect and charge normally through the USB port. Replacing with a fresh pack avoids this entirely if the original has tripped protection and won't respond to pre-charge.

Compatible Models

Big Jambox J2011-03-US J2011-02-US

Replaces Part Numbers

J200/ICR18650F1L 8390-KA02-0580

Technical Specifications

Voltage11.1V
Amp Hours2600mAh
Capacity2600mAh
Rate28.86Wh
Net Weight240g /8.47 oz
Gross Weight380g /13.40 oz
Approximate Weight380g /13.40 oz
Dimension 196.80 x 21.35 x 18.70mm

Product Highlights

  • Brand: Jawbone
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: Li-ion
  • Battery Type: Li-ion
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My Big Jambox cuts out at high volume even though the battery shows half full — is that a speaker fault or a battery fault?

That's a battery fault, not a speaker fault. At high volume, the amplifier and Bluetooth radio draw current simultaneously, and a degraded pack can't sustain the combined load without the voltage sagging below the amplifier's operating threshold. The speaker shuts the amp down to protect itself, which looks like a cutout rather than a low-battery warning. Fit a fresh 11.1V pack and the sag under combined load disappears.

The Big Jambox gets noticeably warm during long play sessions — is that normal or a sign the battery is failing?

Some warmth is normal — the amplifier and battery discharge both generate heat inside the fabric housing, which has limited ventilation. If the housing feels hot rather than warm, or the speaker throttles volume on its own, the pack's internal resistance has likely risen from age or deep discharge cycles, meaning it's generating more heat than it should under load. Check whether the warmth increased gradually over months — that pattern points to cell degradation rather than a speaker fault. Replacing the pack brings internal resistance back to spec and reduces operating temperature.

The Big Jambox plays for a fraction of what it used to, but the battery reads full right after charging — what's causing the mismatch?

This is fuel gauge drift from shallow cycling. When the speaker is charged from 60–80% repeatedly without a full discharge, the battery management system loses its calibration reference for the empty point and starts reporting inaccurate state-of-charge figures. The actual cell capacity has also faded from the cycling pattern, so both the gauge and the true capacity are off. Run the speaker down below 20% once, then charge fully to recalibrate — if playtime doesn't recover after two full cycles, the cells have faded past the point recalibration can fix and the pack needs replacing.

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